Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual data teve um resultado de 7-20?
 ###Tabelas: CREATE TABLE conference_winners_and_tournaments (conference_winners_and_tournaments_id AUTO_INCREMENT PRIMARY KEY, Conference VARCHAR, Regular Season Winner VARCHAR, Conference Player of the Year VARCHAR, Conference Tournament VARCHAR, Tournament Venue (City) VARCHAR, Tournament Winner VARCHAR) CREATE TABLE preseason (preseason_id AUTO_INCREMENT PRIMARY KEY, Week VARCHAR, Date VARCHAR, Kickoff VARCHAR, Opponent VARCHAR, Result VARCHAR, Record VARCHAR, Game Site VARCHAR, NFL Recap VARCHAR) CREATE TABLE major_league_soccer (major_league_soccer_id AUTO_INCREMENT PRIMARY KEY, Metropolitan Area VARCHAR, Media Market Ranking INT, Since INT, MLB Team(s) VARCHAR, NBA Team(s) VARCHAR) CREATE TABLE multiple_asian_games_gold_medalists (multiple_asian_games_gold_medalists_id AUTO_INCREMENT PRIMARY KEY, Athlete VARCHAR, Sport VARCHAR, Asian Games VARCHAR, Gold INT, Silver INT, Bronze INT, Total INT) CREATE TABLE 1971_isle_of_man_senior_tt_500cc_final_standings (1971_isle_of_man_senior_tt_500cc_final_standings_id AUTO_INCREMENT PRIMARY KEY, Place INT, Rider VARCHAR, Country VARCHAR, Machine VARCHAR, Speed VARCHAR, Time VARCHAR, Points INT)  
SELECT Date FROM preseason WHERE Result = 7–20